CN104837422A - External fixing device, for treating bone fractures - Google Patents

External fixing device, for treating bone fractures Download PDF

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Publication number
CN104837422A
CN104837422A CN201480003308.XA CN201480003308A CN104837422A CN 104837422 A CN104837422 A CN 104837422A CN 201480003308 A CN201480003308 A CN 201480003308A CN 104837422 A CN104837422 A CN 104837422A
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CN
China
Prior art keywords
component
fixture
external fixation
spherojoint
ball type
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201480003308.XA
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Chinese (zh)
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CN104837422B (en
Inventor
伦佐·索菲亚蒂
乔瓦尼·法乔利
布鲁诺·马格南
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Tecres SpA
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Tecres SpA
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Publication of CN104837422A publication Critical patent/CN104837422A/en
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Publication of CN104837422B publication Critical patent/CN104837422B/en
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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/66Alignment, compression or distraction mechanisms
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64Devices extending alongside the bones to be positioned
    • A61B17/6416Devices extending alongside the bones to be positioned with non-continuous, e.g. hinged, pin-clamp connecting element
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64Devices extending alongside the bones to be positioned
    • A61B17/6425Devices extending alongside the bones to be positioned specially adapted to be fitted across a bone joint
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B17/64Devices extending alongside the bones to be positioned
    • A61B17/6458Devices extending alongside the bones to be positioned with pin-clamps fixed at ends of connecting element
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/60Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
    • A61B2017/603Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors with three points of contact, e.g. tripod

Abstract

An external fixing device (1, 100, 200) for the treatment of bone fractures comprises a first member (2, 102, 202), a second member (3, 103, 203), a central body (4, 104, 204) arranged between the first member (2, 102, 202) and the second member (3, 103, 203), a first ball joint (5, 105, 205) for the articulated connection of the first member (2, 102, 202) with the central body (4, 104, 204), a second ball joint (6, 106, 206) for the articulated connection of the second member (3, 103, 203) with the central body (4, 104, 204), locking means (11, 11'; 111, 111'; 211, 211') operatively associated to the first ball joint (5, 105, 205) and with the second ball joint (6, 106, 206), respectively, the locking means being suitable for allowing/preventing the articulation of the first member (2, 102, 202) and second member (3, 103, 203) with respect to the central body (4, 104, 204), wherein the first member (2, 102, 202) comprises a first clamp (7, 107, 207), the second member (3, 103, 203) comprises a second clamp (8, 108, 208) and the central body (4, 104, 204) comprises a third clamp (9, 109, 209) for the connection of the external fixing device (1, 100, 200) to respective fractured bone portions to be treated.

Description

For the external fixation device of fractures
Technical field
The present invention relates to a kind of external fixation device for fractures, and more specifically, relate to a kind of radial type external fixation device being used for the treatment of fracture of calcaneus.
Background technology
External fixation device for fractures is known.This device allows two knochenbruch ends to remain in the position of expectation, promotes the correct joint of two knochenbruch ends with the natural process by being called as osteosynthesis.Dissimilar external fixation device can be used according to the configuration in epiphysis portion to be treated.
The special treatment with reference to fracture of calcaneus, known fixture comprises two or three fixtures of the predetermined portions for fixture being connected to heel, to allow the correct location of the minimizing of fracture itself and sclerite.
It is known that heel fracture is difficult to due to following multiple factor treat: the shape of bone, multivessel existence and the many nervous tissues existence in this region perhaps of supply heel peripheral part.Therefore, surgeon does not always have the optimum that can be used in device itself being attached to bone parts to be treated during fixture is applied to heel.
In the simple fracture of heel or the treatment of restricted fracture, can use the fixture comprising two jockeies, the relative position of two jockeies can change at intra-operative.
But this device has the shortcoming that application is limited to simple fracture.
In fact, the relative position of two fixtures only can change along the single plane residing for these two fixtures in space, thus limits the application of such fixture truly.When the heel fracture needing treatment more complicated, the external fixation device comprising three jockeies can be used.Surgeon by acting on the relative position for regulating the appropriate device of described three fixtures to change three fixtures, can be adapted to bone parts to be treated to make the size of fixture best at intra-operative.
But this embodiment of external fixation device also has following shortcoming, that is, what make the relative position of three fixtures change in space is limited in one's ability.In fact, fixture can move along single plane.Therefore, the relative position of three fixtures can only change along such direction.
As mentioned above, because fixture only can move in single plane, therefore this scheme can not solve needs the plane pinpoint situation of jockey along misalignment each other.
Surgeon in the treatment calcaneus difficulty run into of compromise is: known fixture change jockey position in space limited in one's ability, thus limits the probability making the size of fixture be adapted to the specific dimensions of heel member to be treated truly.
Summary of the invention
An object of the present invention is to provide a kind of external fixation device allowing to overcome above-mentioned shortcoming.
Another object of the present invention is to provide a kind of external fixation device, and wherein, the relative position of jockey can change with the larger amplitude of accommodation in space.
Another object of the present invention is to provide a kind of external fixation device, and wherein, the adjustment of the relative position of jockey is easily implemented, to shorten the operating time to patient.
Another object of the present invention is to provide a kind of external fixation device, and wherein, fixture is locked in securely in the position selected by surgeon during the application phase of this fixture itself.
According to an aspect of the present invention, external fixation device according to claim 1 is provided.
Dependent claims relates to preferred and favourable embodiment of the present invention.
Accompanying drawing explanation
Other Characteristics and advantages of the present invention are by from becoming clearly in the detailed description of the embodiment of nonexcludability to external fixation device preferred being used for heel, described embodiment exemplarily illustrate in the accompanying drawings but not for restriction object, in the accompanying drawings:
Fig. 1 is the axonometric chart according to external fixation device of the present invention;
Fig. 2 is the front view of the external fixation device according to Fig. 1;
Fig. 3 is the top view of the external fixation device according to Fig. 1;
Fig. 4 is the side view of the external fixation device according to Fig. 1;
Fig. 5 is the zoomed-in view of the details of external fixation device according to Fig. 1;
Fig. 6 is the amplification stereogram of the parts of external fixation device according to Fig. 5;
Fig. 7 is the axonometric chart of another embodiment according to external fixation device of the present invention;
Fig. 8 is the front view of the external fixation device according to Fig. 7;
Fig. 9 is the top view of the external fixation device according to Fig. 7;
Figure 10 is the side view of the external fixation device according to Fig. 7;
Figure 11 is the axonometric chart of another embodiment according to external fixation device of the present invention;
Figure 12 is the axonometric chart of the details of external fixation device according to Figure 11;
Figure 13 shows the front view of the details according to external fixation device of the present invention by the parts be separated;
Figure 14 is the sectional view of the details of the external fixation device shown in Figure 13 of intercepting along the line XIV-XIV of Figure 13; And
Figure 15 is the rough schematic view of the number of assembling steps/configuration of the details of fixture according to Figure 12.
Detailed description of the invention
With reference to accompanying drawing, Reference numeral 1 generally represents the external fixation device being used for fractures.
Especially, such external fixation device 1 is preset and is used for the treatment of fracture of calcaneus.
According to another embodiment, such external fixation device 1 presets the fracture being used for the treatment of other bone parts.
In addition, term " compression " means the gap that the crack reduced between described end is drawn close in two epiphysis portions relatively, and term " separation " means two epiphysis portion away to increase the gap in the crack between described end.
Fixture 1 according to the present invention comprises the first component 2 and second component 3, central body 4, first spherojoint 5 and the second spherojoint 6, wherein, first component 2 and second component 3 have roughly microscler shape, central body 4 is arranged between the first component 2 and second component 3, first spherojoint 5 is connected with the radial type of central body 4 for the first component 2, and the second spherojoint 6 is connected for the radial type of second component 3 with central body 4.
Fixture 1 also comprises the first fixture 7, second fixture 8 and the 3rd fixture 9, wherein, first fixture 7 is associated with the first component 2 in a movable manner, and the second fixture 8 is associated with second component 3 in a movable manner, and the 3rd fixture 9 is associated with the top place of central body 4 at central body 4.
First fixture 7, second fixture 8 and the 3rd fixture 9 are suitable for accommodating pin or screw or similar well known elements, to guarantee the connection of fixture 1 and bone parts to be treated.
The first component 2 and/or second component 3 can be made respectively to change along basic any direction relative to the position of central body 4 by the first spherojoint 5 and the second spherojoint 6.
With reference to the embodiment of the fixture 1 shown in Fig. 2 to Fig. 4, as non-limiting example, can relative to central body 4 along such as by arrow 10,10 ', 10 " direction in three orthogonal planes of illustrating guides the first component 2 and/or second component 3.
Therefore, can relative to the 3rd fixture 9 in hinged mode along at least orthogonal aforesaid plane 10,10 ', 10 " guide the first fixture 7.
Similarly, can relative to the 3rd fixture 9 along at least aforesaid plane 10,10 ', 10 " guide the second fixture 8.
In this way, the basic arbitrary assembled configuration of fixture 1 itself can be obtained.
Once obtained fixture 1 with the configuration of the most close match of fracture to be treated, just can lock the relative position of the first component 2 relative to central body 4 by acting on locking device 11.This locking device 11 is operatively associated with the first spherojoint 5 hereinafter more clearly described.
Similarly, the relative position of second component 3 relative to central body 4 can be locked by acting on the locking device 11 ' be operatively associated with the second spherojoint 6.Locking device 11 and locking device 11 ' mutually the same, therefore, hereafter only locking device 11 is described.
First component 2 has the seat portion 13 for accommodating first spherojoint 5 at an end 12 place.Especially, after the first component 2 is connected to the first spherojoint 5, end 12 is towards central body 4 itself.Seat portion 13 can have spherical, the hemispherical of hollow or similar shape or substantially have the shape of the ball-shaped end being suitable for accommodating first joint 5.
Similarly, second component 3 has the seat portion 15 for accommodating second spherojoint 6 at an end 14 place.
End 14 after second component 3 is connected to the second spherojoint 6 towards central body 4.
First spherojoint 5 and the second spherojoint 6 have identical structure.Therefore, hereafter only will be described the structure of the first spherojoint 5, and should be understood that, the element of the correspondence existed in the second spherojoint 6 will be illustrated by identical Reference numeral in the accompanying drawings.
In variant of the present invention shown in Fig. 1 to Fig. 6, first spherojoint 5 comprises elongated elements 16, this elongated elements 16 has substantial cylindrical shape and is partly contained in be located in the port in ball type device 17 for accommodating elongated elements 16 in ball type device 17, and this elongated elements 16 can move relative to ball type device 17 in port.
Fig. 6 shows elongated elements 16, and this elongated elements 16 is coaxial and stretch out from an only part for ball type device 17 with ball type device 17.
The equivalents of the position of elongated elements 16 can be predicted and do not deviate from protection scope of the present invention.
Threaded portion 18 along elongated elements 16 and is more specifically at least formed along from the outward extending part of ball type device 17, that this threaded portion 18 is suitable for permission first spherojoint 5 and central body 4 or be connected with its removable of parts extremely to be connected.
Especially, threaded portion 18 can be associated with being formed in central body 4 or the corresponding threaded seat portion be formed in the element extremely to be connected of threaded portion 18, and this portion is not shown in the drawings.
The end be arranged in ball type device 17 of elongated elements 16 has expansion section 19.The expansion section 19 being such as frustoconical or similar shape has at least one cross section larger than the cross section of the port of ball type device 17, and expansion section 19 is suitable for the radial dilatation of the symmetry determining ball type device 17, thus causes the first component 2 and the relative locking between central body 4 and/or the relative locking between second component 3 and central body 4.
Due to this radial dilatation, the outer surface of ball type device 17 is arranged to the inner surface in the seat portion partially or even wholly abutting the first component 2.
Based on the degree of the radial dilatation of element 17, the interference degrees between the outer surface of ball type device itself and the inner surface in corresponding seat portion can be changed, thus partly limit or stop completely the mobility of spherojoint 5.
The configuration of the those widened sections 19 of insertion section is advantageously different from the configuration of port at these a part of 19 places.Favourable like this, because this makes the contact area between elongated elements 16 and port reduce and friction therefore between elongated elements 16 and port reduces, thus make elongated elements 16 easier in ball type device 17 along a direction and slide in the other direction.In addition, due to the radial dilatation almost symmetry of ball type device 17, therefore ball type device 17 abuts the corresponding seat portion in the first component 2 equably, thus guarantees the stable of spherojoint 5 and firmly lock.
As hereinafter illustrated better, after the first component 2 is connected to central body 4 by the first spherojoint 5, surgeon can lock the relative motion of the first component 2 and central body 4 by acting on locking device 11.
Locking device 11 comprises at least one adjusting nut 20, and this adjusting nut 20 is associated with the threaded portion 18 of elongated elements 16.
As shown in Figure 5, after the first spherojoint 5 is connected to central body 4, at least one adjusting nut 20 described is arranged between ball type device 17 and central body 4 itself.
Ball type device 17 has at least one the radial notch 21 being suitable for allowing the radial dilatation of ball type device 17 own.
Preferably, be provided with at least one notch 21 of radial-type, at least one notch 21 described is suitable for the roughly symmetrical radial dilatation allowing ball type device 17 itself.
Such as, can arrange two diametrically opposite notches 21, described notch 21 is designed to the roughly symmetrical radial dilatation realizing ball type device 17 itself.Ball type device 17 can also have the angularly isolated notch of different number, such as, shown in Fig. 63 or 4 notches.
After the first spherojoint 5 being connected to central body 4 and subsequently the first component 2 is connected to the first spherojoint 5, the mobility of the first joint 5 itself can being locked by acting on adjusting nut 20, thus the first component 2 is constrained to central body 4.
In fact, by acting on adjusting nut 20, the expansion section 19 of elongated elements 16 is moved forward in ball type device 17, thus cause the radial dilatation of ball type device 17.
Ball type device 17 becomes the seat portion 13 of abutting first component 2 by expanding, thus prevents the first component 2 and the relative rotation between central body 4 practically.
By acting on adjusting nut 20 along contrary direction, the external diameter of ball type device 17 reduces, thus recovers the mobility of the first spherojoint 5.
Correctly central authorities are placed in relative to ball type device 17 in order to realize elongated elements 16, and therefore guarantee the radial dilatation of the almost symmetry of ball type device 17, be provided with at least one guide element 22 or be more specifically provided with at least one pair of guide element 22, guide element 22 is also slidably bonded at least one notch 21 from elongated elements 16 is outstanding.
Shown in embodiment as shown in Figure 6, guide element 22 comprises from two diametrically outstanding protuberances of elongated elements 16.But can adopt other embodiments, wherein, guide element 22 is pin-shaped or similar shape and is suitable for sliding along at least one notch 21.
Guide element 22 is used as the guidance part relative to ball type device 17 of elongated elements 16, thus avoids the rotation of elongated elements 16 in ball type device 17, guarantees that elongated elements 16 is placed in central authorities relative to ball type device 17 and guarantees the radial dilatation of almost symmetry of ball type device 17.
Finally, in order to the relative rotation not hindering ball type device 17 to be present in portion 13, guide element 22 is placed in completely in ball type device 17 between the first component 2 fixation phase.
By with the mode effect similar about the mode of the first spherojoint 5 described before, can be changed by the locking device 11 ' acting on the second spherojoint 6 and lock the relative position of second component 3 relative to central body 4.
Especially, cause ball type device 17 being formed in the radial dilatation/contraction in the seat portion 15 in second component 3 by acting on the adjusting nut 20 be associated with the second spherojoint 6, thus allow/stop second component 3 itself relative to the mobility of central body 4.
In another program of the present invention, in order to ensure another degree of freedom that escapement 1 has in the first adjustment of component 2 relative to the position of central body 4, preset the shim elements 23 used at least one accommodating present portion 13.
Preset and at least one shim elements 23 described is arranged between the first component 2 and the first joint 5.
Especially, also therefore arrange between present portion 13 and the ball type device 17 of the first joint 5 in the accommodating present portion 13 of at least one layer 23.
Therefore, at least one shim elements 23 described makes ball type device 17 move forward towards the outside that seat portion 13 is own by reducing the inner space in seat portion 13, therefore increases the distance between the first component 2 and central body 4.
Similarly, the position of second component 3 relative to central body 4 can be changed by least one shim elements 23 ' be contained in the seat portion 15 of second component 3.
Fixture 1 is connected with bone parts to be treated by means of fixture 7,8,9.
According to the method known in the art, first fixture 7, second fixture 8 and the 3rd fixture 9 have the upper part be associated with low portion removably separately, to allow accommodating pin, screw or like for external fixation device 1 being connected to bone parts to be treated and fastening these pin, screw or likes subsequently.
For this purpose, the first fixture 7, second fixture 8 and the 3rd fixture 9 have at least one pair of portion 24 separately, can unshowned pin, screw or similar element in accommodating accompanying drawing at least one pair of portion 24 described.
First fixture 7 is associated in movable mode with the first component 2 along the longitudinal direction.Especially, the first fixture 7 comprises base portion 25.Also be provided with attachment screw 27, the first fixture 7 is connected to base portion 25 by this attachment screw 27.
First fixture 7 is associated with base portion 25 removably by attachment screw 27.
Therefore, according to the method known in the art, to allow between the upper part of fixture 7 and the low portion of fixture 7 removable is connected for attachment screw 27.
By acting on attachment screw 27, the first fixture 7 can be unclamped from base portion 25 and make the first fixture 7 unshowned vertical axis corresponding with the axis of screw 27 around accompanying drawing rotate subsequently.In this way, change fixture 7 relative to the first component 2 and/or the orientation of longitudinal direction being formed in the linear guidance part 26 in the first component 2 along the longitudinal direction, thus change to be administered in the pin of bone parts to be treated or the orientation of attachment screw.
The base portion 25 of the first fixture 7 and/or more particularly the first fixture 7 slidably can be associated with linear guidance part 26 along linear guidance part 26.
Linear guidance part 26 comprises a portion 28 and device 29, wherein, seat portion 28 such as formed in a longitudinal direction along the first component 2 through the groove of the first component 2 or recess, device 29 is for regulating the first fixture 7 along the position of the first component 2.
Adjusting device 29 comprises adjustment screw 30, and this adjustment screw 30 is directed in a longitudinal direction along the first component 2, and to be connected by screw-and-nut formula with the base portion 25 of the first fixture 7 and be associated.Therefore, by turning adjusting screw 30, first fixture 7 is moved along the first component 2.
Second fixture 8 and second component 3 adopt the method similar with the method for the connection about the first fixture 7 and the first component 2 mentioned above to be associated in movable mode.
Especially, the second fixture 8 comprises base portion 31, and base portion 31 is slidably associated with linear guidance part 32 along linear guidance part 32, and this linear guidance part 32 is formed in a longitudinal direction along second component 3.
Linear guidance part 32 comprises a portion 34 and device 35, and seat portion 34 is formed along second component 3, and device 35 is for regulating the second fixture 8 along the position of second component 3.
The adjusting device 35 similar with the adjusting device 29 of the first fixture 7 comprises adjustment screw 36, and this adjustment screw 36 is directed in a longitudinal direction along second component 3, and is associated with the base portion 31 of the second fixture 8 by the connection of screw-and-nut formula.
Therefore, by turning adjusting screw 36, achieve the second fixture 8 moving along second component 3.
With similar for the content described by the first fixture 7 above, the second fixture 8 is associated with base portion 31 removably by attachment screw 37.By acting on attachment screw 37, the orientation of the second fixture 8 about substantially vertically axis unshowned in accompanying drawing can be changed, thus change to be administered in the pin of bone parts to be treated or the orientation of attachment screw.
Therefore, due to the first fixture 7 can be changed along the relative position of the first component 2 and/or the second fixture 8 along the relative position of second component 3, therefore surgeon can implement in case of need epiphysis portion to be treated separately and compress.
In addition, surgeon can make the first fixture 7 and/or the second fixture 8 rotate around corresponding vertical axis, and the orientation of connecting pin can be made to be suitable for the shape of bone parts to be treated and therefore to make the configuration of fixture 1 be suitable for the shape of bone parts to be treated.
Be similar to the first fixture 7 and the second fixture the 8, three fixture 9 comprises upper part 38 and low portion 39.
In variant of the present invention shown in Fig. 1 to Fig. 4, bottom 39 is fixedly connected to central body 4, and upper part 38 is connected to bottom 39 removably by attachment screw 40.
In the accompanying drawings in another variant unshowned, upper part 38 and low portion 39 are connected to central body 4 removably by attachment screw 40.Therefore, with similar for the content described by the first fixture 7 and the second fixture 8, can rotate by making the 3rd fixture 9 unshowned vertical axis corresponding to the axis of screw 40 in accompanying drawing the orientation changing the 3rd fixture 9 above.
The existence of 3rd fixture 9 at central body 4 place allows the treatment of fracture of calcaneus fixture 1 being effectively applied to any type, no matter is when simple fracture or when complicated fracture.
In fact, fixture 1 according to the present invention has the first fixture 7, second fixture 8 in any mutual alignment that can relative to each other substantially be hinged in space and the 3rd fixture 9.
Especially, the 3rd fixture 9 is used as reference element fixture 1 being connected to position to be treated.
In addition, first fixture 7 and the second fixture 8 by the hinged any position can roughly located in space of the first spherojoint 5 and the second spherojoint 6 and the 3rd fixture 9, because this ensure that the probability making the size of external fixation device 1 be suitable for the heel fracture of any type to be treated.
Fig. 7 to Figure 10 shows another embodiment according to external fixation device of the present invention, and entirety by reference number 100 represents.
Hereinafter, add that 100 represent with the element that elements relative as described above is answered with identical Reference numeral.
The central body 104 that fixture 1 comprises the first component 102, second component 103 and is arranged between the first component 102 and second component 103.
Central body 104 comprises the first roughly ball joint 105 and second roughly ball joint 106, wherein, first roughly ball joint 105 be connected with the radial type of central body 104 for the first component 102, second roughly ball joint 106 be connected for the radial type of second component 103 with central body 104.
Fixture 100 also comprises the first fixture 107, second fixture 108 and the 3rd fixture 109, wherein, first fixture 107 is associated with the first component 102 in movable mode, second fixture 108 is associated with second component 103 in movable mode, and the 3rd fixture 109 is associated with the top place of central body 104 at central body 104.
With similar for the content described by aforementioned embodiments, first fixture 107, second fixture 108 and the 3rd fixture 109 are suitable for unshowned pin in accommodating accompanying drawing, screw or similar well known elements, to guarantee the connection of fixture 100 and fractured bone portions to be treated.
Fixture 100 and aforementioned embodiments are different in following: the configuration of the first spherojoint 105 and the configuration of the second spherojoint 106, and the configuration of the configuration of the locking device 111 relevant to the first component 102 and the locking device 111 ' relevant with second component 103.
First component 102 and second component 103 have the microscler shape of such as cylindrical, prismatic or analogous shape.
First component 102 has prismatic parts 141 at an end 112 place.
End 112 is own towards central body 104 after the first component 102 is connected to central body 104.
Hollow seat portion 113 is formed so that the first spherojoint 105 is connected to the first component 102 at prismatic parts 141 place.
Hollow seat portion 113 is a part for ball, and hollow seat portion 113 allows the ball-shaped end of the first spherojoint 105 to be placed in wherein.
First spherojoint 105 is connected to the first component 102 by locking device 111.
Locking device 111 has the hollow seat portion 143 being shaped as and being similar to spherical part, and locking device 111 is associated with prismatic parts 141 removably by least one screw 142.
Locking device 111 comprises the cap of the boundary such as limiting hollow seat portion 143.
By being associated with prismatic parts 141 by locking device 111, hollow seat portion 113 and hollow seat portion 143 are formed and the ball-shaped end of the first spherojoint 105 are contained in interior roughly spherical seat portion.
Make locking device 111 abut the ball-shaped end of the first spherojoint 105 by acting on screw 142, thus stop the movement that the ball-shaped end of the first spherojoint 105 is present in portion 113 practically.
In this way, the first component 102 can be allowed/prevent relative to the movement of central body 104.
Second component 103 is connected to central body 104 by the second spherojoint 106, and this second spherojoint 106 formalizes in the mode similar with the first spherojoint 105.
Second component 103 has prism-shaped component 143 at an end 114 place.Especially, end 114 faces central body 104 after second component 103 is connected to central body 104 by the second spherojoint 106.
Prism-shaped component 143 comprises the seat portion 134 being shaped as and being similar to spherical part, and this portion 134 is for the ball-shaped end of accommodating second spherojoint 106.
Second spherojoint 106 is connected to second component 103 by locking device 111 '.
The locking device 111 ' constructed in the mode similar with locking device 111 is associated with the prismatic parts 143 of second component 103 removably by least one screw 144.
Locking device 111 ' has the hollow seat portion 146 being shaped as and being similar to spherical part.Locking device 111 ' comprises the cap of the boundary such as limiting hollow seat portion 146.
Therefore, by being associated with prismatic parts 143 by locking device 111 ', hollow seat portion 134 and 146 is formed and the ball-shaped end of the second spherojoint 106 is contained in interior roughly spherical seat portion.
The operation of locking device 111 ' is identical with the operation of locking device 111, therefore will no longer be further described locking device 111 '.
In addition, the present embodiment of fixture 100 also allows in such as Fig. 8 and Figure 10 by arrow 110,110 ', 110 " three orthogonal planes of representing change the relative position of the first fixture 107 relative to the 3rd fixture 109.
In fact, the first fixture 107 is associated with the first component 102, and this first component 102 is connected to central body 104 by the first spherojoint 105 in hinged mode.
Similarly, by second component 103 being connected with central body 104 by means of the second spherojoint 106, can along aforementioned three directions 110,110 ', 110 " the second fixture 108 is directed relative to the 3rd fixture 109.
First fixture 107 in a longitudinal direction B is slidably associated with the first component 102.
Especially, the first fixture 107 comprises and is equipped with base portion 125, first component 102 of port 147 to insert this port 147.
The configuration of port 147 corresponds to the configuration of the first component 102.In this way, define between the first component 102 and the first fixture 107 and can be dynamically connected accurately.
First fixture 107 is regulated along the position of the first component 102 by adjusting device 129.Adjusting device 129 comprises the adjustment screw 130 arranged abreast with the first component 102.
Adjustment screw 130 is associated with an end of prismatic parts 141 by the connection of worm spiral formula, and is associated with the base portion 125 of the first fixture 107 by the connection of screw-and-nut formula in opposition side.
Therefore, by turning adjusting screw 130, the first fixture 107 is moved along the first component 102.
Second fixture 108 be slidably associated with second component 103 about the mode that the mode described by the first fixture 107 is similar above.
Especially, the second fixture 108 comprises the base portion 131 being equipped with port 148, and second component 103 is contained in this port 148.
The configuration of port 148 corresponds to the configuration of second component 103.In this way, define between second component 103 and the second fixture 108 and can be dynamically connected accurately.
Therefore, the second fixture 108 is associated with second component 103 in a sliding manner by the adjusting device 135 comprising adjustment screw 136.Adjustment screw 136 is associated with the prismatic parts 143 of second component 103 by Worm type connection an end, and is associated with the base portion 131 of the second fixture 108 by the connection of screw-and-nut formula.
Thus, the second fixture 108 moving along second component 103 is obtained by turning adjusting screw 136.
Figure 11 to Figure 15 shows another embodiment according to external fixation device of the present invention, and entirety by reference number 200 represents.
With aforementioned embodiments similarly, the central body 204 that fixture 200 comprises the first component 202, second component 203 and is arranged between the first component 203 and second component 203.
Fixture 200 comprises the first spherojoint 205 and the second spherojoint 206, and wherein, the first spherojoint 205 is connected with the radial type of central body 204 for the first component 202, and the second spherojoint 206 is connected for the radial type of second component 203 with central body 204.
First spherojoint 205 and the second spherojoint 206 can be connected to central body 204 removably.
Similar with aforementioned embodiments, fixture 200 comprises the first fixture 207, second fixture 208 and the 3rd fixture 209, wherein, first fixture 207 is associated with the first component 202 in movable mode, second fixture 208 is associated with second component 203 in movable mode, 3rd fixture 209 is associated with the top place of central body 4 at central body, each fixture is all suitable for accommodating one or more pin, screw or similar well known elements of not illustrating in the drawings, to guarantee the connection of fixture 200 and fractured bone portions to be treated.
Fixture 200 and aforementioned embodiments are different in following: the configuration of the first spherojoint 205 and the second spherojoint 206, and first component 202 at place of seat portion and the configuration of second component 203 that are contained in corresponding joint.
In addition, fixture 200 and aforementioned embodiments are different in following: the configuration of the locking device 211 ' of the configuration of the locking device 211 of the first spherojoint 205 at the first component 202 place and the second spherojoint 206 at second component 203 place, this will more clearly describe hereinafter.
First component 202 and second component 203 have the configuration similar with the configuration of the first component 2 and second component 3.
An end 212 place of the first component 202 has the seat portion 213 for accommodating first spherojoint 205, and this portion 213 is configured to roughly as spherical caps, and this will discuss hereinafter further.Especially, the end 212 of the first component after the first component 202 is connected to the first spherojoint 205 towards central body 204.
Similarly, an end 214 place of second component 203 has the seat portion 215 for accommodating second spherojoint 206, and wherein, this portion 215 has the configuration similar with the configuration in the seat portion be formed in the first component 203.
First spherojoint 205 and the second spherojoint 206 have identical configuration.Therefore, hereafter will only be described the configuration of the first spherojoint 205, wherein, understanding, is arranged on the element of the correspondence in the second spherojoint 206 by shown in the drawings with identical Reference numeral.
Concrete with reference to Figure 13 and Figure 14, the first spherojoint 205 comprises roughly spherical ball type device 217, and elongated elements 216 highlights from this ball type device 217.Elongated elements 216 is constrained to ball type device 217.
Ball type device 217 comprises the substantial cylindrical central part 251 be arranged between two roughly spherical cap portion 252.Ball type device 217 is sized to and the round base portion of each roughly spherical cap portion 252 is mated with the respective bases in substantial cylindrical portion 251.Ball type device 217 can or such as be obtained with single-piece by a part for the outer surface of milling ball type device itself, or is obtained by the assembling of a lot of separate part in a manner known to specialists skilled in the present field.Elongated elements 216 as above has microscler configuration and radially erects from ball type device 217 at the side place in substantial cylindrical portion 251.In fact, in substantial cylindrical portion 251, be provided with such as threaded radial accommodation seat portion, this radial accommodation seat portion for elongated elements 216 its on be formed with the appropriate section (attached not shown) of the threaded portion of corresponding pitch.Under any circumstance, joint between elongated elements 216 and ball type device 217 can be formed by the engagement device of equivalence, the engagement device that be such as hasp insert type or other are similar, or elongated elements can be made in the mode of single-piece with ball type device 217.
Substantial cylindrical central part 251 has the less radius r (specifically see Figure 14) of the radius of curvature R than each roughly spherical cap portion 252 at its circular cross section place, make ball type device 217 have less overall dimensions in the plane parallel with the base portion of this substantial cylindrical central part 251.
The free end with such as cylindrical configuration of elongated elements 216 is designed in use be inserted into the inside in the corresponding seat portion be formed in central body 204.Therefore, in order to this object, annular recessed portion 250 can be formed on elongated elements 216 for for engaging object, the corresponding engagement device be arranged in central body 204 engages.Under any circumstance, the engagement device of other configurations known to those skilled in the art can be preset.Elongated elements 216 such as can comprise the threaded portion of back-outing in the seat portion being designed to be screwed into the correspondence be arranged in central body 204 or from the seat portion of correspondence, and this portion is correspondingly with the screw thread with identical thread pitch.
Can find out, very simple according to the configuration of the elongated elements 216 of this illustrative embodiments.
Such spherojoint 205 is preset and is contained in corresponding hollow accommodation seat portion 213, and this hollow accommodation seat portion 213 is formed in end 212 place of the first component 202.This hollow accommodation seat portion 213 has roughly spherical hat shape configuration, it has the radius of curvature more bigger than the radius of curvature R in the generally cup-shaped portion 252 of ball type device 217, and this hollow accommodation seat portion 213 limits the boundary of entrance 213 ' by the configuration of circular, and the configuration of this circular has more bigger than the radius r of the circular cross-section of substantial cylindrical central part 251 but less than the radius of curvature R in generally cup-shaped portion 252 radius.
The hollow accommodation seat portion 213 be shaped as roughly as spherical caps defines the boundary at least equal with the volume of the half of the ball type device 217 of joint 205 region of volume.
Hollow seat portion 213 is that unlimited (opening 213 ") be not to interfere elongated elements 216 when the elongated elements 216 of spherojoint 205 inserts in seat portion 213 on top.At this upper opening 213 " place at its two opposite sides place; the first component 202 comprises two plates of jaw end 255; as hereafter will more clearly summarized, and two plates of described jaw end 255 are designed so that the ball type device 217 of joint 205 is present locking/fastened in place in portion 213.
Advantageously, the accommodation seat portion 213 of generally cup-shaped makes being sized to once the ball type device 217 locks in place of joint 205, then it is connected on the surface in generally cup-shaped portion 252 of ball type device equably, therefore guarantees to have large composition surface between ball type device 217 and seat portion 213.
In other words, accommodation seat portion 213 has the geometry accurately corresponding with the shape of the ball type device of joint 205 in its attachment configuration, and this geometry can be such as the shape in spheric seat portion.By this configuration, spherojoint 205 is only arranged at the base portion of cylindrical portion 251 opening 213 that and elongated elements 216 parallel with entrance 213 ' be arranged between two plates " can insert in corresponding seat portion 213 when aiming at.
Spherojoint 205 according to present embodiment of the present invention comprises locking device 211, this locking device 211 be in use intended to for insert when the ball type device 217 of joint 205 corresponding in seat portion 213 in time prevent the rotation of the ball type device 217 of joint 205.
This locking device 211 comprises the clamping device of two plates of such as jaw end 255, this clamping device is such as the screw 253 that can be screwed in corresponding threaded seat portion 254 or back-out from the threaded seat portion 254 of correspondence, and this corresponding threaded seat portion 254 is formed in aforementioned panels for this object be threaded.
Once the ball type device 217 of joint 205 has inserted in corresponding seat portion 213 and ball type device itself has rotated in the position of expectation, then by screw 253 being screwed in corresponding seat portion 254 and will there is the plate holder of jaw element 255 together, thus as explained above, accommodation seat portion 213 is correspondingly decreased to be enough to obtain the effective locking of ball type device 217 in desired locations.
Advantageously, in order to be remained on by locking device 211 in the main body of first component 202, in use less thickness will be had with the plate portion of the jaw end 255 of the head contact of screw 253.
Alternatively, can arrange notch or labelling on screw 253, this notch or labelling object are to illustrate whether two of jaw end 255 plates correctly clip together to operator during joint 205 is locked in corresponding seat portion 213.
Elongated elements 216 is preset and is inserted in the seat portion of the correspondence not shown in figures be formed in central body 204.More particularly, the contrary both sides place of central body 204 comprises at least one portion engaged with elongated elements 216, to guarantee the connection of at least one first component 202 and second component 203.
According to variant of the present invention, the connection between the elongated elements 216 of central body 204 and the first spherojoint 205 and the elongated elements 216 of the second spherojoint 206 or for (as illustrated according to fixture 100 in such as Fig. 7) of fixed pattern or for removable.
As non-limiting example, the connection between the first spherojoint 205 and central body 204 can be formed by the interlock do not illustrated in the drawings, and this interlock is type as known in the art and is therefore not described further.
Especially, interlock can be bonded in the annular seat 250 be formed on elongated elements, and this annular seat 250 is such as near the free end (Figure 12) of elongated elements 216.
As for the connection between the first involved spherojoint 205 and the first component 202, with reference to the exemplary scenario shown in Figure 13.
Correspondingly, define the connection between the second joint 206 and second component 203, and therefore will no longer be described further this connection.
In initial configuration A, the first component 202 and the first spherojoint 205 are separated from each other.
In order to the first spherojoint 205 being interlocked in the seat portion 213 that is formed in the first component 202, joint location becomes to make elongated elements 216 and the upper opening 213 between two plates being included in jaw end 255 " aim at, and the round base portion of substantial cylindrical central part 251 is arranged to parallel with the entrance 213 ' in seat portion 213 (Figure 13, Figure 14 and Figure 15-configuration A).
Spherojoint 205 is then inserted into the inside (Figure 15-configuration B) in a portion 213 and the elongated elements 216 of joint 205 enters into the position of expectation.Should be noted that, as long as make spherojoint 205 move in present portion relative to its on position---such as by making elongated elements 216 angularly move down (Figure 15-configuration C), then the ball type device 217 of joint 205 keeps engaging in present portion itself, because seat portion itself and entrance 213 ' have the size preventing the ball type device 217 of joint 205 from deviating from.
Therefore, once joint 205 has entered into the position of expectation, then in order to prevent joint 205 to be present the rotation in portion 213 and to be inserted by screw 253 and to be screwed to threaded seat portion 254 inner, thus by two of jaw end 255 plate holders together (Figure 15-configuration D).
In this way, the compression of jaw end 255 causes the reduction in accommodation seat portion 213, thus is enough to the even joint that causes between the generally cup-shaped portion 252 of ball type device 217 and the inner surface in seat portion 213, therefore guarantees effective locking of joint.
Can find out, accommodation seat portion 213 is of a size of the larger size in surface that ball type device 217 is contacted with accommodation seat portion 213, and this is conducive to the firm and permanent locking of joint 205 in the position expected.
Then, elongated elements 216 is engaged with central body 204, thus obtain the connection between the first component 202 and central body 204 according to the angle direction expected.
If spherojoint 205 needs to disconnect with the first corresponding component 202, then complete identical operation in reverse order.
The structure of spherojoint 205 is simple and be easy to application.Similar with aforementioned embodiments, the present embodiment of fixture 200 has the advantage being easy to the position regulating and be applied to fracture to be treated.
In order to the first component 202 and second component 203 are assembled to central body 204 by the first spherojoint 205 and the second spherojoint 206, it is enough for performing according to description above, and then the elongated elements 216 of corresponding joint 205 and joint 206 is connected to central body 204.
Fixture 200 according to the present invention has the first fixture 207, second fixture 208 for being connected with fractured bone portions to be treated and the 3rd fixture 209.First fixture 207 and the second fixture 208 can move in hinged mode relative to the 3rd fixture 209.
More specifically, the first fixture 207 is associated with the first component 202 in movable mode along the longitudinal direction.
Especially, the first fixture 207 comprises base portion 225.Also be provided with the attachment screw 227 for being clamped against its base portion 225 by the first fixture 207.Therefore, attachment screw 227 allows to be connected removably according to methods known in the art between the upper part of fixture 207 with its base portion 225.
By acting on attachment screw 227, can the first fixture 207 be unclamped from corresponding base portion 225 and make the first fixture 207 unshowned vertical axis corresponding with the axis of screw 227 around accompanying drawing rotate subsequently.In this way, can change fixture 207 relative to the first component 202 and/or the orientation of the longitudinal direction that is formed in the linear guidance part 226 in the first component 202 along the longitudinal direction, thus change position and the orientation of the pin in bone parts to be treated to be administered or attachment screw.
The base portion of the first fixture 207 and/or particularly the first fixture 207 is slidably associated with linear guidance part 226 along linear guidance part 226.
Linear guidance part 226 comprises a portion 228 and device 229, wherein, seat portion 228 such as formed in a longitudinal direction along the first component 202 through the groove of the first component 202 or throughgoing recesses, device 229 is for regulating the position of the first fixture 207 along the first component 202.
Adjusting device 229 comprises adjustment screw (attached not shown), this adjustment screw is present directed in a longitudinal direction along the first component 202 in portion 228, and the base portion 225 of this adjustment screw and the first fixture 207 is connected by screw-and-nut formula and is associated.
Therefore, by turning adjusting screw, the first fixture 207 moves in portion 228 is present by the first component 202.
Second fixture 208 is to be associated in movable mode with second component 203 with the mode similar with the mode of the connection of the first component 202 about the first fixture 207 mentioned above.
By this configuration of fixture 207 and fixture 208, surgeon can make the first fixture 207 and/or the second fixture 208 rotate around corresponding vertical axis, thus change the orientation of the connecting pin that can be bonded on wherein, and the configuration of fixture 200 is therefore made to be suitable for the shape of bone parts to be treated.
Be similar to the first fixture 207 and the second fixture the 208, three fixture 209 comprises upper part 238 and low portion 239.
In variant shown in Figure 11, upper part 238 is connected to low portion 239 removably by attachment screw 240, and with the content described for the first fixture 207 and the second fixture 208 above similarly, can by the orientation making the 3rd fixture 209 unshowned vertical axis corresponding with the axis of screw 240 in accompanying drawing rotate to change the 3rd fixture 209.
3rd fixture 209 when the fixture 200 that the setting at central body 204 place is allowed for the fracture of calcaneus for the treatment of any type at Fracture Simple and in complicated fracture effective use.
In fact, fixture 200 according to the present invention has the first fixture 207, second fixture 208 in any mutual alignment that can relative to each other be hinged in space substantially and the 3rd fixture 209.
Especially, the 3rd fixture 209 is used as the reference element of fixture 200 to the connection of position to be treated.Can find out, in all embodiments of said external fixture, the first fixture 7,107,207 and second fixture 8,108,208 can move in hinged mode relative to the 3rd fixture 9,109,209.
Especially, the first fixture 7,107,207 and second fixture 8,108,208 can along at least three orthogonal planar movements.
The first fixture 7,107,207 and second fixture 8,108,208 can be guided to give surgeon the larger degree of freedom when fixture 1,100,200 itself is connected to bone parts to be treated by intra-operative along basic any direction in space relative to the 3rd fixture 9,109,209, even also like this when there is complicated fracture.
Which overcome the first component in the external fixation device of prior art and second component only can relative to each other along the only possible direction in space or only move in plane at most in space.
The present invention conceived in this way can stand to conceive contained multiple amendment and distortion by the present invention.
In addition, all details all can be replaced by the details of other equivalences technically.In fact, therefore the material used and the shape and size different because of situation for any applicable type as required, and can not depart from the protection domain of claims.

Claims (24)

1. the external fixation device for fractures (1,100,200), described external fixation device (1,100,200) comprises the first component (2,102,202), second component (3,103,203), central body (4,104,204), the first spherojoint (5,105,205), the second spherojoint (6,106,206), locking device (11,11 ', 111,111 ', 211, 211 '), wherein, described central body (4, 104, 204) described first component (2 is arranged on, 102, 202) with described second component (3, 103, 203) between, described first spherojoint (5, 105, 205) for described first component (2, 102, 202) with described central body (4, 104, 204) radial type connects, described second spherojoint (6, 106, 206) for described second component (3, 103, 203) with described central body (4, 104, 204) radial type connects, described locking device (11, 11 ', 111,111 ', 211, 211 ') with described first spherojoint (5, 105, 205) and described second spherojoint (6, 106, 206) be operatively associated, described locking device is designed to allow/prevent described first component (2, 102, 202) and described second component (3, 103, 203) respectively relative to described central body (4, 104, 204) hinged, it is characterized in that, described first component (2, 102, 202) the first fixture (7 is comprised, 107, 207), described second component (3, 103, 203) the second fixture (8 is comprised, 108, 208), and described central body (4, 104, 204) the 3rd fixture (9 is comprised, 109, 209), for described external fixation device (1, 100, 200) with the connection of corresponding fractured bone portions to be treated.
2. external fixation device according to claim 1 (1,100,200), wherein, described external fixation device (1,100,200) is the external fixation device for calcaneus.
3. external fixation device according to claim 1 (1,100,200), wherein, described first fixture (7,107,207) is hinged to described 3rd fixture (9,109,209) by means of described first spherojoint (5,105,205) along at least three orthogonal planes (10,10 ', 10 ").
4. external fixation device according to claim 1 (1,100,200), wherein, described second fixture (8,108,208) is hinged to described 3rd fixture (9,109,209) by means of described second spherojoint (6,106,206) along at least three orthogonal planes (10,10 ', 10 ").
5. the external fixation device (1,100,200) according to any one in aforementioned claim, wherein, described first fixture (7,107,207) in a longitudinal direction (A, B) is associated with described first component (2,102,202) in a movable manner, and described second fixture (8,108,208) in a longitudinal direction (A ', B ') be associated with described second component (3,103,203) in a movable manner.
6. the external fixation device (1,100,200) according to any one in aforementioned claim, wherein, described first component (2,102,202) comprises the seat portion (13,113,213) for accommodating described first spherojoint (5,105,205).
7. the external fixation device (1,100,200) according to any one in aforementioned claim, wherein, described second component (3,103,203) comprises the seat portion (15,115,215) for accommodating described second spherojoint (6,106,206).
8. the external fixation device (1,100,200) according to any one in aforementioned claim, wherein, described first spherojoint (5,105,205) and described second spherojoint (6,106,206) comprise elongated elements (16,216) and ball type device (17,217) separately, and described elongated elements (16,216) is coaxial and stretch out from described ball type device (17,217) with described ball type device (17,217).
9. external fixation device according to claim 8 (200), wherein, described ball type device (217) comprises substantial cylindrical central part (251), and described substantial cylindrical central part (251) is arranged between two generally cup-shaped portions (252).
10. external fixation device according to claim 9 (200), wherein, described substantial cylindrical central part (251) is provided with the radius (r) less than the radius of curvature (R) in each the generally cup-shaped portion in described generally cup-shaped portion (252) at its circular cross section place, makes described ball type device (217) have less overall dimensions in the plane parallel with the base portion of described substantial cylindrical central part (251).
11. bases quote the external fixation device according to claim 10 (200) when claim 6 and 7, wherein, for accommodating corresponding spherojoint (205, 206) described seat portion (213, 215) each portion in each defines the boundary in hat shape region, described hat shape region has the radius of curvature more bigger than the described radius of curvature (R) of described generally cup-shaped portion (252), and described seat portion (213, 215) each portion in all has circular entrance (213 '), described circular entrance (213 ') has more bigger than the described radius (r) of the described circular cross-section of described substantial cylindrical central part (251) but less than the described radius of curvature (R) of described generally cup-shaped portion (252) radius.
12. external fixation devices (200) according to any one in claim 9 to 11, comprise the locking device (211,211 ') for stoping the rotation of described ball type device (217) in corresponding seat portion (213,215).
13. bases quote the external fixation device according to claim 12 (200) when claim 6 and 7, wherein, described seat portion (213,215) is provided with upper opening (213 ", 215 "), and described upper opening (213 ", 215 ") is in use receiving the described elongated elements (216) of described joint (205,206).
14. external fixation devices according to claim 13 (200), wherein, the two opposite sides place of described upper opening (213 ", 215 ") is positioned at described upper opening (213 ", 215 ") place, described component (202,203) is provided with two plates of jaw end (255), and two plates of described jaw end (255) are designed to the described ball type device (217) of described joint (205,206) locking/fastened in place in corresponding seat portion (213,215).
15. external fixation devices according to claim 14 (200), wherein, described locking device (211,211 ') comprises screw (253), and described screw (253) can join the threaded seat portion (254) of the correspondence obtained at the described plate of the described jaw end (255) of top, the corresponding seat portion (213,215) that is arranged in of each component (202,203) to.
16. external fixation devices (200) according to any one in claim 9 to 16, wherein, once described ball type device (217) is by described locking device (211,211 ') locks in place, the described surface of described generally cup-shaped portion (252) is just connected on the described inner surface of described seat portion (213,215) equably, thus guarantees the wide composition surface between described ball type device (217) and described seat portion (213,215).
17. external fixation devices (1) according to any one in claim 1 to 8, wherein, described elongated elements (16) from described ball type device (17) outward extending part be threaded portion (18).
18. external fixation devices according to claim 17 (1), wherein, described threaded portion (18) can join in the threaded seat portion of the correspondence obtained in described central body (4).
19. external fixation devices (1) according to claim 17 or 18, wherein, described elongated elements (16) comprises expansion section (19), described expansion section (19) is positioned at the end being arranged on described ball type device (17) of described elongated elements (16), and described expansion section (19) are designed to the radial dilatation causing described ball type device (17).
20. according to claim 17 to the external fixation device (1) described in any one in 19, wherein, described ball type device (17) is provided with at least one the radial notch (21) of the radial dilatation being designed to allow described ball type device (17).
21. according to claim 17 to the external fixation device (1) described in any one in 20, wherein, described locking device (11,11 ') comprises at least one adjusting nut (20), and described at least one adjusting nut (20) is operatively associated along the corresponding threaded portion (18) of described elongated elements (16) with described spherojoint (5,6).
22. according to claim 17 to the external fixation device (1) described in any one in 21, wherein, described elongated elements (16) comprises at least one guide element (22), described at least one guide element (22) is configured to protuberance, pin etc., wherein, described guide element (22) extends from described elongated elements (16) and can slide along described at least one notch (21) of described ball type device (17).
23., according to claim 17 to the external fixation device (1) described in any one in 22, comprising: can along for accommodation in described seat portion (13), to be arranged between described first component (2) and described first joint (5) and to be designed to change the shim elements (23) of described first component (2) and the distance of described central body (4); And/or comprise: can be contained in described seat portion (14), to be arranged between described second component (3) and described second joint (6) and to be designed to change the shim elements (23 ') of described second component (3) and the distance of described central body (4).
24. external fixation devices (100) according to any one in claim 1 to 7, wherein, described locking device (111,111 ') is connected to the end (112,114) of corresponding component (102,103) removably by means of screw (142,144), and described screw (142,144) is designed so that described locking device (111,111 ') abuts corresponding spherojoint (105,106).
CN201480003308.XA 2013-01-21 2014-01-21 External fixation device for fractures Active CN104837422B (en)

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IT000013A ITVR20130013A1 (en) 2013-01-21 2013-01-21 EXTERNAL FIXING DEVICE FOR THE TREATMENT OF BONE FRACTURES
PCT/IB2014/058443 WO2014111907A1 (en) 2013-01-21 2014-01-21 External fixing device, for treating bone fractures

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